Am I correct in reading that Longbets charges a $50 fee for publishing a prediction and they have to be a minimum of 2 years in the future? Thats a bit harsh. But these sites are pretty interesting. And they could be useful to. You could judge the accuracy of different users including how accurate they are at guessing long-term, short-term, etc predictions as well as how accurate they are in different catagories (or just how accurate they are on average if you want to be simple.) Then you can create a fairly decent picture of the future, albeit I expect many of the predictions will contradict each other. This is kind of what their already doing obviously, but they could still take it a step further.